When an extended white object is placed before a convex lens, colored images are formed. The image of the smallest size is of the color:
When an object is placed at a distance of 36 cm from a convex lens, an image of the same size as the object is formed. What will be the nature of image formed when the object is placed at a distance of :
(a) 10 cm from the lens ?
(b) 20 cm from the lens ?